Each Honeywell W8703A 1003 Damper Interface Module (DIMP) expands capacity of a Honeywell EnviraZone Networked Zoning Control Panel up to 3 zones. A total of 9 zones may be acheived by utilizing two Honeywell W8703A 1003 Damper Interface Modules. Up to three Honeywell VisionPro IAQ TH9421C1004 or Honeywell TH5320C 1002 (or combination of) communicating thermostats can be used per module. To see which EnviraZone Networked Zoning Systems and thermostats this module will work with, please see the Accessories tab above.

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In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.